Fluorosilicone oil exhibits excellent chemical resistance in power battery peripheral components, making it an ideal material choice for harsh battery environments. The high electronegativity of fluorine atoms in its molecular structure, combined with the stability of the silicon-oxygen backbone, gives it strong resistance to electrolytes, organic solvents, strong acids and bases, and high-temperature oxidative environments.

In power battery systems, peripheral components such as seals, insulation gaskets, sensor housings, and connector coatings are often in contact with lithium-ion battery electrolytes (such as carbonate solvents and LiPF₆ salt solutions) and corrosive byproducts generated during thermal runaway. Traditional silicone oils are easily swollen or degraded, while fluorosilicone oil, due to the oleophobic and hydrophobic properties of its fluorocarbon chain, effectively prevents electrolyte penetration, maintaining stable physical properties.  Its volume change rate after long-term use is less than 2%, far superior to ordinary silicone rubber and fluororubber.

Furthermore, fluorosilicone oil maintains its lubrication and sealing performance over a wide temperature range of -40°C to 200°C, exhibiting excellent thermal oxidative resistance and capable of withstanding localized overheating conditions in battery packs. Tests show that after 1000 hours of immersion in 1M LiPF₆/EC/DMC electrolyte at 85°C, fluorosilicone oil samples showed no significant mass loss, cracks, or discoloration, while ordinary silicone oil showed significant swelling and hardening.

Its low surface tension and excellent hydrophobicity also provide moisture and condensation resistance, effectively protecting circuit boards and high-voltage connection terminals, reducing the risk of electrochemical corrosion. Therefore, fluorosilicone oil is widely used in power battery sealants, thermal interface materials, insulation coatings, and lubricating grease base oils, making it a key material for improving the long-term reliability and safety of battery systems.